source: trunk/third/xscreensaver/hacks/bumps.h @ 20148

/* Bumps, Copyright (c) 2001 Shane Smit <CodeWeaver@DigitalLoom.org>
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation.  No representations are made about the suitability of this
 * software for any purpose.  It is provided "as is" without express or
 * implied warranty.
 *
 * Module: "Bumps.h"
 * Tab Size: 4
 *
 * Description:
 *  Header file for module "Bumps.c"
 *
 * Modification History:
 *  [10/01/99] - Shane Smit: Creation
 *  [10/08/99] - Shane Smit: Port to C. (Ick)
 *  [03/08/02] - Shane Smit: New movement code.
 *  [09/12/02] - Shane Smit: MIT-SHM XImages.
 *                                                       Thanks to Kennett Galbraith <http://www.Alpha-II.com/>
 *                                                       for code optimization.
 */


#ifndef _BUMPS_H
#define _BUMPS_H


#include <math.h>
#include "screenhack.h"
#include <X11/Xutil.h>

#ifdef HAVE_XSHM_EXTENSION
#include "xshm.h"
#endif /* HAVE_XSHM_EXTENSION */


/* Defines: */
/* #define VERBOSE */
#define RANDOM() ((int) (random() & 0X7FFFFFFFL))

typedef signed char             int8_;
typedef unsigned char   uint8_;
typedef short                   int16_;
typedef unsigned short  uint16_;
typedef long                    int32_;
typedef unsigned long   uint32_;
typedef unsigned char   BOOL;


/* Globals: */
char *progclass = "Bumps";

char *defaults [] = {
  ".background: black",
  ".foreground: white",
  "*color:              random",
  "*colorcount: 64",
  "*delay:              30000",
  "*soften:             1",
  "*invert:             FALSE",
#ifdef __sgi    /* really, HAVE_READ_DISPLAY_EXTENSION */
  "*visualID:   Best",
#endif
#ifdef HAVE_XSHM_EXTENSION
  "*useSHM:             True",
#endif /* HAVE_XSHM_EXTENSION */
  0
};

XrmOptionDescRec options [] = {
  { "-color",           ".color",               XrmoptionSepArg, 0 },
  { "-colorcount",      ".colorcount",  XrmoptionSepArg, 0 },
  { "-delay",           ".delay",               XrmoptionSepArg, 0 },
  { "-soften",          ".soften",              XrmoptionSepArg, 0 },
  { "-invert",          ".invert",              XrmoptionNoArg, "TRUE" },
#ifdef HAVE_XSHM_EXTENSION
  { "-shm",                     ".useSHM",              XrmoptionNoArg, "True" },
  { "-no-shm",          ".useSHM",              XrmoptionNoArg, "False" },
#endif /* HAVE_XSHM_EXTENSION */

  { 0, 0, 0, 0 }
};


/* This structure handles everything to do with the spotlight, and is designed to be
 * a member of TBumps. */
typedef struct
{
        uint8_ *aLightMap;
        uint16_ nFalloffDiameter, nFalloffRadius;
        uint16_ nLightDiameter, nLightRadius;
        float nAccelX, nAccelY;
        float nAccelMax;
        float nVelocityX, nVelocityY;
        float nVelocityMax;
        float nXPos, nYPos;
} SSpotLight;

void CreateSpotLight( SSpotLight *, uint16_, uint16_ );
void CreateTables( SSpotLight * );
void DestroySpotLight( SSpotLight *pSpotLight ) { free( pSpotLight->aLightMap ); }


/* The entire program's operation is contained within this structure. */
typedef struct
{
        /* XWindows specific variables. */
        Display *pDisplay;
        Window Win;
        GC GraphicsContext;
        uint32_ *aColors;
        XImage *pXImage;
#ifdef HAVE_XSHM_EXTENSION
        XShmSegmentInfo XShmInfo;
        Bool    bUseShm;
#endif /* HAVE_XSHM_EXTENSION */

        uint8_ nColorCount;                             /* Number of colors used. */
        uint8_ bytesPerPixel;
        uint16_ iWinWidth, iWinHeight;
        uint16_ *aBumpMap;                              /* The actual bump map. */

        SSpotLight SpotLight;
} SBumps;

void CreateBumps( SBumps *, Display *, Window );
void Execute( SBumps * );
void DestroyBumps( SBumps * );

void SetPalette( SBumps *, XWindowAttributes * );
void InitBumpMap( SBumps *, XWindowAttributes * );
void SoftenBumpMap( SBumps * );


#endif /* _BUMPS_H */


/* vim: ts=4
 */